From e4c9526e081c58298153516956e0090179ae8c3e Mon Sep 17 00:00:00 2001
From: Sam Edwards <CFSworks@gmail.com>
Date: Sat, 26 May 2018 15:17:34 -0600
Subject: [PATCH] ffmpeg: Make read_packet return AVERROR_EOF

Newer versions of FFmpeg deprecate returning 0 to indicate
EOF, and instead request use of AVERROR_EOF.

The oldest supported versions of FFmpeg/libav will treat any
error code the same as returning 0.

Fixes #315
---
 panda/src/ffmpeg/ffmpegVirtualFile.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/panda/src/ffmpeg/ffmpegVirtualFile.cxx b/panda/src/ffmpeg/ffmpegVirtualFile.cxx
index 0d97f0b5f4..b671ce0ba6 100644
--- a/panda/src/ffmpeg/ffmpegVirtualFile.cxx
+++ b/panda/src/ffmpeg/ffmpegVirtualFile.cxx
@@ -209,7 +209,7 @@ read_packet(void *opaque, uint8_t *buf, int size) {
   streampos remaining = self->_start + (streampos)self->_size - in->tellg();
   if (remaining < ssize) {
     if (remaining <= 0) {
-      return 0;
+      return AVERROR_EOF;
     }
 
     ssize = remaining;